Function-Oriented Designing and Generating Technology for thePoint-Contact Tooth Surfaces of Spiral Bevel and Hypoid Gears

摘要

A function-oriented designing and generating technology for the point-contact toothsurfaces of spiral bevel and hypoid gears is introduced.The tooth surface parameters are determineddirectly with the designing variables of the instantaneous transmission function,the locus of toothcontact points and the tooth contact ellipse dimension to design the point-contact tooth surfaces withthe expected performances.The formulae for designing are provided.The designed tooth surfaces aregenerated with the free-form bevel gear machine,and the basic equations and formulae for thefour-axis generating of the tooth surfaces are presented.The generating motions are expressed as thefunctions of the work gear rotary angle,which is taken as a motion parameter.The methods todetermine the motion functions and the other machine setting parameters are explained through anexample.